Valve for air compressors and the like



Jan; 19 1.926.

B. v. NORDBERG VALVE FOR AIR coMPREssoRs AND- THE LIKE Filed August 21, 1917 5 Sheets- Sheet 1 attocnclw I H I 1570,392 Jan. 19,1926- 3 VVNQRDVBERG VALVE FOR AIR GOMPRESSORS AND THE LIKE 3141mm r01;

drum) K/Vordbef I 1,570,392 B.- v. NORDBERG I VALVE FOR AIR COMPRESSORS- AND THE LIKE Filed August 21, 1917 J13 Sheets-Sheet :5"

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atented a... 19, 1926.

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' OFFICE.

PAT

VALVE non Ara-coarranssoes Ann THE LIKE.

"Application filed August 21, 1917. Serial No, 187,487.

To all whom it may concerm Be it known that I, BRUNO V. Nonnenno, a citizenpf the United States, residing at Milwaukee, in the county of Milwaukee and State or' Wisconsin, have invented certain new and .useful Improvements in Valves for .Air Compressors and the like, of which the following is a. specification.

This invention pertains to self acting valves for air compressors, that is valves that are opened and closed by the action of and out of the com- During speed of air compressors .has been greatly increased because 1t was found necessary or desirable to operate them by means 0: electric motors, and although the higher speed also, reduces the efficiency of the comcompressor the convenience of gearing the to the motor or of directly conmakes it posto the pressors,

meeting the same to the motor, sible to sacrifice some economy higher speed.

The higher compressor speed has brought into use several types of valves made of sheet steel, the object being to reduce the to make it quicker and also to reduce the lift of the valve so that the greatest possible valve opening is obtained with the smallest possible motion or lift of the valve.

The valve forming the basis and the invention has for one of its objects the production of a valve which will afford amaximum exhaust or intake passage as the case may be, or 1n other words to obtain as much area for the exhaust .or intake through or by thevalve as there is through the opening covered by the valve, such opening being substantially unobstructedby the valve when .the valve is lifted off its seat.

The invention has for a further object the production of a valve casing or seat casting so constructed that it may be readily placed in position and as readily removed if for any reason it becomes necessary or desirable to substitute a new valve mechanism for one previously positioned. 1

Several embodiments are illustrated in the annexed drawings, wherein Figure 1 is a transverse sectional view of showing one the past few years the rotative p p of'the pres-f ent invention is of the same general type,

'mitting a free Fig. 2 is a longitudinal sectional view j taken on the line IIII of Fig. 1;

Fig. 3 a transverse section illustrating suction and, discharge valves communicatng with a common port leading to the cylinder of the compressor;

Fig. 4 line IVIV of Fig. 3;

Fig. 5 a longitudinal view on theline VV of Figs. 3 and 4;

Fig. 6 a detail longitudinal sectional view seat;

Fig. and; I Fig. '8 a perspective view of one of the valves and its spring.

Referring first to Figs. 1 and 2, 1 de- 7 'a"transverse section of such valve notes a ortion of the body of an air c'ompressor aving a'port 2 leading from the space behind the compressor piston and 3 denotes the space into or through which the air is discharged after-leaving the valve. The seat of the valve, or valves, is formed 1n a cylindrical plug 4 provided with a series of ports or chambers 5 which lie below and are in direct communication with I a series of oblong slots orports Gv opening directly into such chambers 5.

The upper face of the wall of partition in which the ports 6 are formed is flat and a series of plate valves, preferably formed of. spring metal and denoted by ,8, rest upon said face, one for each port. Said valves are slightly longer and wider than the elongated ports 6 and are normally. held to thelr seats by overlying bowed springs 9, one for each valve. As will be seen the central. downwardly bowed portion of the spring contacts with the underlying valve, and the valves and springs are held in their proper relation to each other and to thevalv'e seat by an over- .iyiing guard plate 10 held in place by rough bolts'll. Said plate is of grid like form and is rovided with pockets 12 into which exten springs 8 and 9. The pockets while permovement of the s ring and valve, prevent the same from shi ing endwise and laterally, or in other words always ensure the valve being properly positioned withv reference to the seat and hold the s ring in proper position with reference to t e valve. r

a longitudinal sectional view on the the central portion of.

the ends of the valves and h horizontal sectional of thevalves lifted from its ber.

Upon air being forced through port 2' The member 4, constructed as above set forth, and the element 10, may be termed, respectively, seat and cap sections which form a valve chamber between rn,and, as seen, are provided, respectively, 1th port and flow slots which open into cham under pressure in excess of that obtaining in space 3 the valves will be lifted from their seats. The initial movement of the valve doubtless causes the ends to rise or curve upwardly and take the curvature of the spring, and, finally the valve as a whole comes equalized the valves close and so remain until the pressure in 2 is again in egrc'ess. In Figs. 6 and? the valve is shown 1n its mid position, the valve having been raised as a whole and the spring partly compressed.

It will thus be seen that I have provided a plate valve which afl ords ample clearance and one which is easy'to construct and position. Furthermore the seat casting may be I turned up and can be laced in the compressor cylinder or he like the valves 1n a Corliss engine, that is the openings are bored in the cylinder in which'these seat castings are fitted. The advantage of this arrangement is manifest as it is possrbleto have on handa complete seat casting with the valves in place which may be quickly substituted for one which may have become defectivein, whole or in part; thus saving much time in hunting out any particular defective valve, substituting a new one therefor and replacing the structure as a whole.

In Figs. 3, 4 and 5 there is illustrated a construction in which the suction and dis charge valves of a compressor communicate with the same port leading to the cylinder, it being manifest that when the arrangement before described is used there must be separate ports for suction and discharge.

In the construction shown in the figures just mentioned the valves, which are of the same type and form as aboveset forth, are placed in a cylindrlcal shaped basket made for con venience in three parts 13, 14: and 15, the parts being held together by a series of machine screws 16. The basket when assembled is secured in the com ressor head, and a cap 17 is screwed on t e outer end of the basket and closes the same.

The valves and springs therefor interposed between members 13 and 15 are held ravages against displacement by bars 18 and 1.9 hav' ing fingers 20 which extend in benveen the ends of the adjacent valves springs. Similar bars 21 and 22 having fingers 23 are employed with the lower set of valves.

The intake or suction port is denoted by 24, the combined suction and discharge port by 25, which port opens into the spaces formed in the wider end of the member! 15, and 2G denotes the compressed air,discharge port.

As under the other construction, it is manifest that the valve element as a whole may be readily inserted and'removed from the cylinder head and that full clearance is obtained.

It is to, be noted that the valve is wholly disconnected from the spring, which simply portion bearing upon the valve, as shown,-

or vice versa.

Having thus descrlbed my invention, what I cla1m 1s:

- 1. A valve for air compressors and the like comprising in combination a valve seat havlng an elongated port; an lmperforate metallic ribbon or plate-like valve of light mass resting thereon; an imperforate bowwgaped spring of like form contacting said v' lve and of a length substantially equal to that of the valve; and a cap section having a discharge port overlying the spring and serving by reason of contact between it1 and the spring to hold the spring in ace. p 2. A valve for air compressors. and the like comprising in combination a valve seat having an elongated port; a spring plate valve resting thereon and normally covering the port; a bow shaped spring having its bowed portion contacting with the valve; and means for positioning the valve and spring in proper working position with each other and to the seat. v

8. In a valve for air compressors and the like, the combination of a valve seat having a plurality of spacedv elongated ports extending therethrough; a plate valve normally covering each port; a spring overlying each valve; a member arranged over said valves and springs; and a bar having fingers extending inwardly between the ad jacent valves and springs and serving -to space and hold the same in place.

4. A ribbon or plate valve comprising w a united seat and cap sections forming a valve chamber betweenthem and provided with port and flow slots respectively opening in to said chamber, a valve plate loosely confined in said chamber and serving to close the port slot, and a flat bowed seating spring 'loosely interposed between the valve plate and the opposing surface of'the cap .section. v

5. A ribbon or plate valve comprising united seat and cap sections forming'a; valve chamber between,.thein and provided with port and flow slots respectively openinginsaid cha mber, a valve plate loosely con- 7 l5 fined in said chamber and serving to close the port slot,'and a flat bowed seating spring loosely interposed. between the valve plate and theopposing surface of the cap section, said valve plate and seating spring being of substantially equal width and eaclrbeing of uniform section throughout.

(3. A ribbon or plate valve comprising united seat and cap sections forming a valve chamber between them and provided with port and flow slots respectively opening into said chamber, said seat section having a plane inner surface forming the valve seat, a thin valve plate of light mass loosely confined in said chamber and servingto close the port slot, and a seating spring loosel-y interposed between the valve plate and the opposing surface ot the cap section and formed of a plate et light mass, said valve plate and seating spring being of substantially equal Width.

In testimony whereof I have signed my name to this specification.

BRUNO V. NORDBERG. 

